Crossfading Function; Beat Counter; Bpm Displays; Beat Offset Display - IMG STAGELINE MPX-222BPM Mode D'emploi

channels CH 1 to CH 4 to minimum, and adjust the
GB
optimal level with the GAIN control (8) of the channel
by means of the VU meter (2). Correct the sound for
the microphone (max. ±15 dB) with the equalizer con-
trols (9) – HIGH for the high range, MID for the mid-
range, LOW for the bass range.
Make the level and sound adjustments for the
second microphone channel in the same way.

5.2 Crossfading function

1) With the two C.F. ASSIGN switches select the two
channels of the input channels CH 1 – CH 4 to be
crossfaded:
With the left C.F. ASSIGN A switch (13) select the
channel to be faded in if the crossfader (16) is slid
to the left.
With the right C.F. ASSIGN B switch (19) select the
channel to be faded in if the crossfader is slid to the
right.
2) Set the faders (15) of the channels not used to mini-
mum and control the two selected channels with
their faders in an optimum way (see chapter 5.1.1).
3) With the crossfader, it is now possible to fade be-
tween the two selected channels.
If both channels are to be fed to the outputs at the
same time, set the crossfader to the mid-position.
4) With the master control (21) adjust the desired total
level which is available at the master output (29). In
case of overload [red LEDs of the VU meter (2) light
up] reduce the master level.

5.3 Beat counter

The two beat counters of the mixer measure the beats
per minute (BPM) for the two channels selected with
the C.F. ASSIGN switches for the crossfading function.
The measured BPM are shown via two displays.
Note: the beat counters only evalute bass beats which
occur four times in succession at approx. the same
4
distance ( / beat). Music pieces which do not show
4
any clear bass drum line in the
gnized by the beat counters and displayed with wrong
values.

5.3.1 BPM displays

Most CD players for disco applications are provided
with operating elements to change the speed of the
beat (pitch controls). For matching the pitch of one
music piece to that of the other via the pitch control
when crossfading between the connected audio sour-
ces (e.g. two CD players), the two BPM displays of the
mixer serve as optical aid.
The left BPM display (14) shows the beats for the
channel selected with the left C.F. ASSIGN A switch
(13) and the right BPM display (18) the beats for the
channel selected with the right C.F. ASSIGN B switch
(19). If no music piece is playing on the selected chan-
nel or if the respective ASSIGN switch is set to "x", the
display is [- - -].
12
4
/ rhythm are not reco-
4
The display range is between approx. 90 BPM and
170 BPM. If the BPM of a title are lower, the display is
[- - -] or a wrong value. Higher BPM values are dis-
played in a divided way (e. g. display 90 BPM in case
of an actual value of 180 BPM).

5.3.2 Beat Offset display

To obtain a smooth transition between the titles when
crossfading, the beats of both titles have to be syn-
chronized, i. e. they must be exactly the same. Via cor-
responding operating elements on the CD player the
pitch of one title can be matched so that it is syn-
chronized with the second title.
When synchronizing the beats of the two music
titles to be crossfaded, the LED indication BEAT OFF-
SET (17) serves as optical control. The further outside
the corresponding LED lighting up is located in the LED
row, the less the two music titles are synchronized:
If the blue LED in the centre lights up, the titles are
synchronized, i. e. their beats are exactly the same.
If one of the two LEDs next to it lights up, the titles
are almost synchronized.
If one of the four outer LEDs lights up, the titles are
not synchronized.
Note: If the BPM of the two titles are far away from
each other, the beat offset display does not respond.

5.4 Mixing of the audio sources

1) To mix the connected audio sources, switch off the
crossfading function. For this purpose, set the C.F.
ASSIGN switches (13 and 19) to position "x".
2) Turn up the master control (21) so much that the
mixing relation of the audio sources can be ad-
justed in an optimum way.
3) With the level controls of the input channels adjust
the desired volume relation of the audio sources
with each other. If a channel is not used, its level
control should be set to minimum.
4) By means of the VU meter (2) adjust with the mas-
ter control the desired total level which is available
at the master output (29).
The optimum level is obtained if the 0 dB range
of the VU meter lights up with music peaks. In case
of overload (red LEDs light up), reduce the output
level with the master control and/or the level con-
trols of the input channels.

5.5 Talkover function

The talkover function serves for better intelligibility
of microphone announcements during the music pro-
gramme. To activate the funcion for a microphone
channel, press the AUTO TALK button (10) of the
channel: if the button is pressed (LED next to the but-
ton lights up), the levels of the channels CH 1 to CH 4
are automatically attenuated by 15 dB during micro-
phone announcements. To switch off the function, re-
lease the button again.